Improvement in tools for milling carriage-shaft eyes



W. S. WARD.

N0.136,112. Patentedfeb.1s,187s.

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UNITED STATES PATENT OFFICE.

wILLIAMs. WARD, or PLANTsvILLE, CONNECTICUT, As'sIGNoE To E. D. sMITH a Co., or SAME PLACE.

IMPROVEMENT IN TOOLS FOR MILLING CARRIAGE-SHAFT EYES.

Specification formingpart of Letters Patent No. 136,112, dated February 18, 1873.

taken in connection with the accompanying.

drawing and the letters of reference marked thereon, to be a full, clear, and .exact descrip tion of the same, and which said drawing eonfstitutes part of this specilication, and represents, inv Figure 1, a side view; Flg. 2, an end view; Fig. 3, a longitudinal central section; and l1n Fig. 4, a shaft-eye which the instrument is designed to dress.

This invention relates to a'tool for dressing the two ends of the article known to the trade `as shaft-eyes-that is to say, the part of a carriage shackle or coupling which is attached These, as represented in Fig. 4, are longer than the width of the shank, and of cylindrical form, and are required to be dressed to give the requisite diam eter and length. The object of this invention is the construction of an instrument for dressing the ends of the eye to a certain defined pointthat is, so that the two ends of the eye will be equidistant from the shank; and it consists in` a mill for dressing the end of the eye combined with a cylindrical mill fordressing the outer surface of, the eye, and a guide which will arrest the tool at the previously-determined distance from the shank.

A is the principal mill, the end of which is formed into Aone or more cutters, a, as seen in Figs. 2 and 3, the diameter of this mill corresponding to the diameter of the shafteye. A

central pin or spindle, B, isarranged in the said mill, which enters the opening through the eye Y to support the eye in proper relative position. Over the mill A a cylinder, G, is arranged, adjustable on the surface ofthe mill A longitudinally, and Vits end constructed with one or more cutters, d, as denoted in Fig. 2, and is set to project beyond the mill A a certain distance to dress the required amount of surface of the eye. Over this cylinder C a cylindrical guide, D, is arranged, adjustable thereon longitudinally, and set relatively to the mills so that when the two mills have done the required amount of work this guide will strike the shank E of the eye, and arrest further cutting. One end having been dressed, the eye is reversed, and the opposite end dressed in like manner, bringing the eye to the required length, and with the shank centrally between the two ends, this last result being difficult to attain by the common milling or turning process. The mill C and guide D are Xed in position by setscrews f or otherwise; but when set in their proper relative positions all revolve together as a single instrument. The cylindrical guide D is constructed with openings Vd through its side, so that the chips cut by the mills will passfreely out and/clear the cutters.

I claim as my invention- The herein-described milling-tool, consisting of the principal mill A, guide D, and the cylindrical mill C, combined and Iliade adjustable relatively to each other in the manner described.

WILLIAMS. WARD'. Witnesses:

' SDMECN H. NORTON,

GEORGE H. LANE. 

